stelican
Well-known member
May have been asked before but still of interest to some.
What are these stainless steel plates for?
- Thread starter stelican
- Start date
KevinV
Well-known member
To aid seperation of water/hull? Cleaner seperation might prevent spray being formed that would be pulled into the bridge by the air vortex?
Total guess, I know nothing about mobo's, but it looks like the spoiler fitted to shelby cobra coupes
Total guess, I know nothing about mobo's, but it looks like the spoiler fitted to shelby cobra coupes
kashurst
Well-known member
Some boats have what look like fixed trim tab plates bolted to the hull. The purpose of those is to extend the effective underwater hull length and trim the bow down a bit for better running. The boat in the picture has Humphree Interceptor trim blades. They lower down vertically into the water and again cause the bow to trim down depending upon their depth into the water. Those stainless steel plates look like the modern equivalent of fixed tabs and are set to keep the boat trimmed at speed under normal ish loads/speeds.
stelican
Well-known member
They don't have the horizontal plates as seen on the be nett type of tabs just vertical plate probably projecting 1 inch below hull
It looks like a big heavy boat
It looks like a big heavy boat
sap_2000
Member
They are fixed interceptors and work just like the Humphrees. They are installed i the propellor stream for more effect and most likely to cure a "bow to high"issue.
Many boats used to have hull extenders which was a like a fixed trim tab inwards of the trim tabs tabs. This is the exact same thing but interceptors instead of tabs. Just like the Humphrees beside them.
Many boats used to have hull extenders which was a like a fixed trim tab inwards of the trim tabs tabs. This is the exact same thing but interceptors instead of tabs. Just like the Humphrees beside them.
stelican
Well-known member
So in effect they are "braking the hull" ?
Bouba
Well-known member
Possibly to counter the extra weight of the hydraulic swim platform ?
sap_2000
Member
Interceptors are said to have less drag vs the lift they produce compared to traditional trim tabs.
In my experience big tabs are better at lower speeds while interceptors are more efficient at higher speeds. So to put a fixed interceptor in the propeller stream makes sense.
I know of several older sunsekker predators with deep tunnels that was prone to run bow high that got fitted fixed curves tunnel interceptors. Made a lot of difference.
